三、全晶体管点火装置 (续)7．点火提前角装置 (续)3)对应于负荷变化的真空提前机构①负载变化和控制点火时间的必要性当负载增大时,一个汽缸每次吸入的混合气体量增多。假设汽车上坡时以40公里/小时的速度行驶,那么,当负载增加时,发动机转速就会下降。假设车速减慢至37公里/小时,这时司机踩加速踏板,使车速提高到原先的40公里/小时。也就是说,发动机的 Third, all transistor ignition (continued) 7. Ignition advance angle device (continued) 3) Vacuum advance mechanism corresponding to load change (1) Necessity of load change and ignition timing control As the load increases, the amount of gas mixture to be sucked in one cylinder increases. Assuming the car goes uphill at 40 km / h, then as the load increases, the engine speed drops. Assuming the speed of the vehicle slows down to 37 km / h, the driver steps on the accelerator to raise the speed to 40 km / h. That is, the engine’s